Let's say I have a bunch of incentive stock options (ISOs) in a company that have vested but I have not exercised yet. If I were to leave the company, I have 90 days to exercise them with ISO tax treatment. But let's say I switch from a regular employee to contractor instead, and my stock option agreement specifies that my ISOs convert to non-qualified stock options (NSOs). Do I still have 90 days to exercise my vested options as ISOs, or do they immediately become NSOs?

@Kevin It's not totally clear to me because does becoming a consultant constitute "termination of employment"?
– Craig WSep 17 '18 at 20:05

2

I'm neither a lawyer nor an accountant, but I'd guess so. Either way, AFAIK there's nothing on the books about this so it's between you, your employer, and (if you can't come to an agreement) possibly a lawyer or two.
– KevinSep 17 '18 at 21:02

Do you really want to risk getting this wrong? Why not ask someone in your company HR department? A member here might have had an identical experience, and give you their excellent advice, but your company handles it differently. That would be 'bad'.
– JoeTaxpayer♦Sep 23 '18 at 13:10